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Linux kernel mirror (for testing)
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1/*
2 * include/asm-ppc/ppc4xx_pic.h
3 *
4 * Interrupt controller driver for PowerPC 4xx-based processors.
5 *
6 * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu>
7 *
8 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
9 * Copyright (c) 2004 Zultys Technologies
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 */
16
17#ifndef __PPC4XX_PIC_H__
18#define __PPC4XX_PIC_H__
19
20#include <linux/types.h>
21#include <linux/irq.h>
22
23/* "Fixed" UIC settings (they are chip, not board specific),
24 * e.g. polarity/triggerring for internal interrupt sources.
25 *
26 * Platform port should provide NR_UICS-sized array named ppc4xx_core_uic_cfg
27 * with these "fixed" settings: .polarity contains exact value which will
28 * be written (masked with "ext_irq_mask") into UICx_PR register,
29 * .triggering - to UICx_TR.
30 *
31 * Settings for external IRQs can be specified separately by the
32 * board support code. In this case properly sized array of unsigned
33 * char named ppc4xx_uic_ext_irq_cfg should be filled with correct
34 * values using IRQ_SENSE_XXXXX and IRQ_POLARITY_XXXXXXX defines.
35 *
36 * If these arrays aren't provided, UIC initialization code keeps firmware
37 * configuration. Also, ppc4xx_uic_ext_irq_cfg implies ppc4xx_core_uic_cfg
38 * is defined.
39 *
40 * Both ppc4xx_core_uic_cfg and ppc4xx_uic_ext_irq_cfg are declared as
41 * "weak" symbols in ppc4xx_pic.c
42 *
43 */
44struct ppc4xx_uic_settings {
45 u32 polarity;
46 u32 triggering;
47 u32 ext_irq_mask;
48};
49
50extern void ppc4xx_pic_init(void);
51
52#endif /* __PPC4XX_PIC_H__ */